Here is a list of sites that offer free graphics you can use on your site.

Note that some of these sites and even some specific photos require that you provide attibution (credit) to the original owner and not all of them are free for commercial use. Always read the license and understand the terms and conditions for the images before you use them.

Don't have the right picture picked out? Check out LoremPixels, Dummy Images or Dummy Image Generator to get a convinient placeholder for your future photo.

Don't forget, you can always use your own photos. Before using them, always be have permission from people, especially from parents of minors which may appear in your images.